Simple and Complex Machines
An object that has a pointed edge.
What is a wedge?
Used when you pull open a door.
What is force?
Something with a definite size, shape, purpose, and can hold a load.
What is a structure?
Acts on an object or structure from outside the structure.
What is an external force?
Load that is subject to change.
What is a dynamic load?
Is used to gain leverage.
What is a lever?
The way something moves, like left, right, up, or down.
What is direction?
Engineers need to consider this when designing a new structure.
What are forces?
Shear, compression, and tension are examples of this type of force.
What is internal force?
Load that doesn't change. The size, position and direction of this load always remain the same.
What is a static load?
Made up of two or more machines.
What is a complex machine?
Mechanism that changes speed on a bicycle?
What are gears?
Cars, Pedestrians, wind, and rain are an example of this.
What is contact force?
Force created without touching another object.
What is non-contact force?
A push on a swing is an example of this type of load.
What is dynamic load?
Example of complex machine that has a lever and wedges.
A system in a machine that can modify a motion.
What is a mechanism?
Type of bridge that uses a semicircular shape to support the load.
What is an arch bridge?
Where the force is making contact with the structure.
What is point of application?
Wind on a tower, rain on a roof, runners on a track are examples of this type of load.
What is dynamic load?
Example of a complex machine that has a wheel and axle, a lever, and an inclined plan for the bucket.
What is a wheelbarrow?
Force that is used when you pedal on a bicycle.
What is the input force?
This bridge has a brace that is made from triangles to provide extra support.
What is a truss bridge?
Intensity or size of a force.
What is magnitude?
Weight of the roof and blocks of a pyramid are examples of this type of load.
What is static load?